I think there may be some issue here.
Firstly, Princess Kate (also known as Catherine, the Duchess of Cambridge) is not a princess in the sense that she is the wife of Prince William and does not have a royal title like "Princess Kate". She is usually referred to as the Duchess of Cambridge or simply Catherine.
Secondly, I couldn't find any information about Princess Kate (or the Duchess of Cambridge) completing chemotherapy. It's possible that this article on Breitbart News may be referring to someone else or contains an error.
Lastly, the hashtags #Zap and #support are not commonly used in news articles or social media posts related to the British royal family.
If you could provide more context or clarify what you're trying to say, I'd be happy to help!
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